End piece for spectacle-frames.



No. 65l,542. P'atentedlune l2, I900.

F. L. BURRUWS.

END PIECE FOR SPEGTAGLE FRAMES. (Application filed May 1, 1897.)

(No Model.)

m: NORRIS PETERS co, FHOTO-LITNQ, wAsumoToN. b, c.

ANTED STATES FRANK L. BURROWS, OF ORANSTON, RHODE ISLAND, ASSIGNOR TO CHARLES A. YVILKINSON, OF \VARWIOK, AND DUTEE l/VILOOX, OF PROVIDENCE,

RHODE ISLAND.

END PIECE FOR SPECTACLE-FRAMES.

SPECIFICATION forming part of Letters Patent No. 651,542, dated June 12, 1900.

Application filed May 1, 1897. Serial No. 634,745. (No model.)

To to whom it may concern! Be it known that I, FRANK L. Bunnows, of the town of Cranston, in the county of Providence, in the State of Rhode Island, have in- 5 vented a certain new and useful Improvement in End Pieces for Spectacle-Frames; and I declare the following to be a specification thereof, reference being had to the accompanying drawings.

I Thisinvention relates to end pieces for spectacle-frames; and it has for its object to provide an end piece which will have a central portion or core of steel or other base metal, in which said base metal will have a plating I of precious metal folded up against the edge thereof to form a plated edge, and in which that portion through which is formed the threaded screw-hole will be sufficiently condensed to permit the formation of durable threads.

In the drawings forming a portion of this specification, Figure 1 is a perspective View of a strip of base metal having a plating of precious metal upon one side thereof and z 5 from which the improved end piece is formed. Fig. 2 is a perspective view of the blank from which the end piece is formed and which is stamped or died out of the plating shown in Fig. 1. Fig. 3 is aperspective view of the end piece when swaged out toform a central boss. Fig. 4 is a section on line 44 of Fig. 3. Fig. 5 is a perspective view of an end piece, showing the precious metal folded up against the central boss to form a continuous plating.

Fig. 6 is a perspective view of the plated end piece prior to the formation of the screw-hole and showing the diminished portion for the reception of the temple. Fig. 7 is a section on line 7 7 of Fig. 6 and showing the position of the folded plating.

Referring now to the drawings,in constructing an end piece in accordance with this invention a sheet of base metal having a plating of precious metal upon one face thereof,

as shown in Fig. 1, is provided, and from this sheet of metal is stamped a blank (shown in Fig. 2) for the construction of an end piece, and by the employment of suitable dies. This blank is then operated upon by a die, which causes the central portion 10 thereof to flow upwardly to form a central boss having an outline corresponding to that of the completed end piece, the precious metal with a thin base-metal backing forming a flange 11, as shown in Figs. 7 and 4. The blank in this condition is then. pressed through a former or bender, which bends the flange 11 upwardly upon the edges of the boss, the surplus of material flowing to equalize the mass, and thus to prevent folds or creases, the result being shown in Fig. 5 of the drawings. Into the bender or former is then passed a special die the cross-section of which is the same as the blank shown in Fig. 5 and one portion of the face of which projects below the remaining portion, this die being forced upon the upper face of the blank, the projecting portion of the die compressing the blank and causing the metal thereof to flow upwardly and fill the recess between the normal upper surface of the blank and the relatively-higher surface of the die, resulting in the completed end piece shown in Figs. 6 and 7 of the drawings and comprising a portion 12 of greater thickness and a portion 11 of lesser thickness,but greater density. Through the portion 13 may be formed a threaded screw-hole, it being understood that in practice two of these end pieces are soldered or otherwise secured to the ends of the split rim of a spectacle-frame, a combined temple and clamping-screw being passed through and in engagement with the perforations in the portion 13.

Having thus described the invention, what is claimed is- The improved end piece for spectacleframes consisting of base metal plated with precious metal, and having a circumscribing flange on the plated side swaged therefrom and folded up against the edge of the base metal to provide a plated edge therefor.

. FRANK L. BURROIVS. Witnesses:

' FREDERICK O. WILKINSON,

WARREN R. Pnnon. 

